1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the NGDOLAOV 3 Phase 380V 100A Bidirectional Electric Energy Power kWh Meter and Over/Under-Voltage Protector Relay Switch. This device is designed to monitor and protect three-phase electrical systems by measuring energy consumption, detecting voltage and current anomalies, and providing protective relay functions.
2. Product Features
- Bidirectional Electric Energy (kWh) Measurement
- Over-Voltage Protection with adjustable upper limit (120-300V)
- Under-Voltage Protection with adjustable lower limit (80-210V)
- Current Limiting with adjustable upper limit (1-100A)
- Adjustable Lower Current Limit (1-100A)
- High Temperature Alarm with adjustable threshold (10-85°C)
- Three-Phase Current Unbalance Alarm (10-100%)
- Voltage Three-Phase Unbalance Alarm
- Adjustable Power-on Delay Time and Reclosing Times
- LCD Display for real-time voltage, current, and energy readings
- Rated Voltage: AC380V, Frequency: 50Hz/60Hz
- Maximum Operating Current: 80A - 99A
- Device Sharing
- Remote Control
- Voice Control
3. Safety Information
WARNING: Electrical shock hazard. Installation and servicing should only be performed by qualified personnel.
- Ensure all power is disconnected before installation or maintenance.
- Verify correct wiring according to local electrical codes and standards.
- Do not operate the device if it appears damaged.
- Keep the device away from moisture and extreme temperatures.
- Use appropriate personal protective equipment (PPE) during installation.
4. Installation and Setup
The device is designed for DIN rail mounting in an electrical panel. Refer to the wiring diagram for proper connection.
Figure 1: Front view of the NGDOLAOV 3 Phase 380V 100A Bidirectional Electric Energy Power kWh Meter, showing the LCD display with voltage readings for L1, L2, L3, and control buttons.
4.1 Wiring Connections
- Mount the device securely on a DIN rail.
- Connect the three-phase input lines (L1, L2, L3) and Neutral (N) to the designated input terminals.
- Connect the corresponding output lines to the load.
- Ensure all connections are tight and secure to prevent loose contacts and overheating.
- Double-check all wiring before applying power.
4.2 Initial Power-On
After successful wiring, apply power to the system. The device LCD will illuminate, displaying real-time voltage and current readings. The default settings will be active upon initial power-on.
5. Operation
The device continuously monitors the electrical parameters of the three-phase system. The LCD displays voltage (U), current (I), and energy (kWh) readings. Use the navigation buttons (up, down, OK, REV) to cycle through different display modes and access settings.
5.1 Display Navigation
- REV Button: Used to reverse or go back in menu navigation.
- Up/Down Arrows: Used to scroll through display parameters or adjust values in settings.
- OK Button: Used to confirm selections or enter setting modes.
5.2 Protection Functions
When an abnormal condition (e.g., over-voltage, under-voltage, over-current, high temperature, phase unbalance) is detected, the device will activate its protection relay, disconnecting the load to prevent damage. After the condition returns to normal and the configured recovery delay time elapses, the device will automatically reclose the circuit.
6. Adjustable Parameters and Settings
The device allows for customization of various protection and operational parameters. Access the settings menu using the control buttons on the front panel.
Figure 2: Dimensions of the NGDOLAOV meter and a table detailing adjustable parameters with their default values.
| Parameter | Adjustable Range | Default Value |
|---|---|---|
| Voltage Upper Limit | 120-300V | 275V |
| Voltage Lower Limit | 80-210V | 175V |
| Current Limit (Upper) | 1-100A | 80A |
| Current Limit (Lower) | 1-100A | 10A |
| High Temperature Alarm | 10-85°C | 85°C |
| Overcurrent Recovery Power-On Delay Time | 1-9999 seconds | 20 seconds |
| Overcurrent Event Threshold Time | 1-999 seconds | 5 seconds |
| Over and Under Voltage Event Recovery Power-On Delay Time | 1-9999 seconds | 20 seconds |
| Over and Under Voltage Event Time Threshold | 1-9999 seconds | 3 seconds |
| Three-Phase Current Unbalance Alarm | 10-100% | 20% |
| Voltage Three-Phase Unbalance Alarm | 10-100% | 20% |
| Power Failure Recovery Delay Time | 1-9999 seconds | 20 seconds |
| Time Threshold for Traffic Loss Events | 1-999 seconds | 10 seconds |
| Power Display Range | 0-9999999.9kWh | N/A (Display Range) |
| Reclosing Times Allowed | 1-30 | 1 |
| Reclosing Recovery Time | 1-99 seconds | 1 second |
| Power-on Delay Time (General) | 1-9999 seconds | 5 seconds |
Note: Some default values are inferred based on similar parameters or common practices if not explicitly stated in the provided text. Always refer to the device's on-screen menu for exact default values.
7. Specifications
| Parameter | Value |
|---|---|
| Rated Voltage | AC380V |
| Frequency | 50Hz/60Hz |
| Maximum Operating Current | 80A - 99A |
| Accuracy Level | 1% |
| Measuring Energy Range | 0-9999999.99kWh |
| Phase Number | Three Phase |
| Display Type | LCD |
| Working Temperature | -20°C to 60°C |
| Dimensions (L*W*H) | 90mm * 77mm * 75.5mm (approx. 3.54 x 3.03 x 2.97 inches) |
| Model | EAEMP3-100-TY-W |
8. Troubleshooting
This section provides solutions to common issues encountered with the device.
- No Display:
- Check power supply connections.
- Ensure the rated voltage is applied correctly.
- Device Not Switching:
- Verify that protection parameters are set correctly (e.g., voltage/current limits).
- Check if the recovery delay time has elapsed.
- Ensure there are no active fault conditions.
- Incorrect Readings:
- Confirm correct wiring of current and voltage inputs.
- Ensure the device is operating within its specified range.
- Frequent Tripping:
- Review the set protection parameters; they might be too sensitive for the application.
- Investigate the electrical system for underlying issues causing over-voltage, under-voltage, or over-current conditions.
If issues persist, contact qualified technical support.
9. Maintenance
The NGDOLAOV meter is designed for minimal maintenance. Regular checks can ensure optimal performance and longevity.
- Cleaning: Periodically clean the device's exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Inspection: Annually inspect wiring connections for tightness and signs of wear or damage.
- Firmware: No user-upgradable firmware is typically available for this type of device.
10. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact the manufacturer directly. Keep your purchase receipt as proof of purchase.
Manufacturer: NGDOLAOV